affirm

affirm /əˈfɚm/ verb
affirms; affirmed; affirming
affirm
/əˈfɚm/
verb
affirms; affirmed; affirming
Britannica Dictionary definition of AFFIRM
[+ object]
1 
formal : to say that something is true in a confident way
Synonyms see: assert
2 
formal : to show a strong belief in or dedication to (something, such as an important idea)
— see also life-affirming
3 
law : to decide that the judgment of another court is correct

— affirmation

/ˌæfɚˈmeɪʃən/ noun
[noncount]
[count]